Loki

Far from a hero, Loki is the staple villain of Thor. The God of Lies and Tickery. Loki is destined to be part of the end of the world.

Originally a Frost Giant, Loki was magically enchanted to look Asgardian. Growing up Loki learned magic from his mother which allowed him to shapeshift and create illusions. With the power of his staff he is also able to indoctrinate the weak willed to become his slaves.

At one point Loki even became female for a long stretch of time. So as far as this story goes, Loki is the perfect character for it.